The U.S. House election, 1948 was an election for the United States House of Representatives in 1948 which coincided with PresidentHarry S. Truman's reelection. Truman had campaigned against a 'do-nothing' Republican Party Congress that had opposed his initiatives and was seen as counterproductive. The Democratic Party regained control of both the House and Senate in this election.[2][3][4] For Democrats, this was their largest gain since 1932. This was the last election to date where a member of a political party other than the Democrats or Republicans had one or more seats in the chamber.

Illinois redistricted its at-large seat into an additional geographical district for a total of 26, changing boundaries across the state and moving several seats from downstate into the Chicago suburbs.[6]